The present invention relates to method to produce a dairy based food composition comprising protein comprising the steps (a) Treating the milk such that at least 98% of the pathogens is removed, (b) Treating the milk with a microfilter of a poresize of 0.01-2 micron such that at least a casein rich fraction and a serum protein rich fraction is obtained, wherein the milk is subjected to a heating treatment before or after the microfiltration and wherein during the production the milk and products obtained from the milk are not subjected to a heat treatment at a temperature above 90° C., and wherein the serum protein rich fraction and/or the casein rich fraction is processed into a food product. The invention also is directed to products made by the process.